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Table 1 Description of traits and numbers of observations for the three datasets

From: Effects of heterozygosity on performance of purebred and crossbred pigs

Dataset

Breed

Animals with genotypesb

Animals with both genotypes and phenotypes

1

Norwegian Landrace

22,558

13,283

2

Dutch Landrace (A)

3238

2377

2

Dutch Large White (B)

3735

2859

2

F1-crossa (X)

1377

1312

3

Synthetic sire linec

19,477

19,135

Dataset 1Norwegian Landrace

Trait

Trait description

Observationsd

Animals

 TNB

Total number born

28,790

13,279

 SB

Number of stillborn piglets

28,790

13,279

 D3

Number of dead piglets at 3 weeks

15,573

9476

 LW3

Litter weight at 3 weeks in kg

16,301

9734

 VAR3W

Variance in weight within litter at 3 weeks

16,138

9619

 SL

Shoulder lesions of sow at weaning

23,466

12,521

 BCS

Body condition score of sow at weaning

23,463

12,521

Dataset 2Dutch Landrace, Large White, and F1

Trait

Trait description

Observationsd

Animals

 TNB

Total number born

35,852

6507

 LB

Piglets born alive

35,812

6507

 GL

Gestation length in days

30,559

5844

Dataset 3Synthetic sire line

Trait

Trait description

Observations

Animals

 W21

21-day weight in kg

11,994

11,994

 W150

150-day weight in kg

11,029

11,029

 BF100

Backfat at 100 kg measured on live animals in mm

14,407

14,407

 LD100

Loin depth at 100 kg measured on live animals in mm

13,844

13,844

 A40

Age at 40 kg in days

16,480

16,480

 DTP

Days test period at boar station (days from 40-120 kg)

16,314

16,314

 TFI

Total feed intake from 40-120 kg in kg (i.e. feed intake per 80 kg live weight gain)

11,947

11,947

 LMP

Lean meat percentage

7476

7476

 DP

Dressing percentage (slaughter weight/live weight)

7475

7475

 IMF

Intramuscular fat percentage measured in the laboratory (g/100 g)

3379

3379

 PHL

pH of loin

3640

3640

 DRIP

Drip loss is the percentage loss of water from a piece of loin muscle between 96 h post mortem to 120 h post mortem

3615

3615

 LB1

Live born first parity

4921

4921

  1. aF1 cross of Dutch Landrace and Large White
  2. bNumber of animals included in the genomic relationship matrix
  3. cThe synthetic line is a sire line made of two lines of the same breed (Line 1 and 2) that have been under selection independently from each other. The dataset contains both animals of the two original lines, their F1 and a backcross (Line 1 × F1)
  4. dMaternal traits have repeated observations for most animals